NOAA is monitoring water levels and winds for Tropical Storm Humberto. Click to view real-time water level and meteorological data.

Lake Erie Harmful Algal Bloom Forecast

NOAA provides forecasts of blue-green algae, or cyanobacteria blooms, in Lake Erie from July to October. Some cyanobacteria blooms can grow
rapidly and produce toxins that cause harm to animal life and humans so scientists describe them as harmful algal blooms (HABs). Coastal communities
can use NOAA's forecasts as a decision making tool.

Bulletins - Want to plan an activity in Lake Erie or need a tool to support HAB event response or research?

NOAA bulletins provide analysis of the location of cyanobacteria blooms, as well as 3-day forecasts of transport, mixing, scum formation,
and bloom decline. During the Lake Erie HAB season which typically begins in July, bulletins are emailed to subscribers twice weekly during
a bloom.